The major portion is excreted within the first 24 hours
Final Thoughts GHK-Cu offers a science-backed, regenerative approach to skin and hair research, with over 50 years of published work, roughly 4,000 documented gene interactions, and clinical trials showing measurable wrinkle reduction, increased collagen density, and improved hair-cell activity in models
Your practitioner will recommend the most appropriate method
Subcutaneous B12 administration, although promising in select cases such as congenital cobalamin disorders, lacks comprehensive comparative studies against IM and oral routes
But, side effects like skin rash, diarrhea, and anxiety can happen